declare type ImpliedVolatilityReturnType = number;
interface IImpliedVolatility {
    S: number;
    K: number;
    t: number;
    rf: number;
    derivativePrice: number;
    type: 'call' | 'put';
    lowStartVol?: number;
    highStartVol?: number;
    tolerance?: number;
    iteration?: number;
}
export declare const impliedVolatility: (params: IImpliedVolatility) => ImpliedVolatilityReturnType;
export {};
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